<!--
Copyright 2017 The Closure Library Authors. All Rights Reserved.

Use of this source code is governed by the Apache License, Version 2.0.
See the COPYING file for details.
-->
<style>
 #popup {
  position: absolute;
}
#anchor {
  margin-left: 100px;
}
</style>
<span id="anchor">
 anchor
</span>
<div id="popup">
 Popup.
</div>